function setRem(resolving){
	!function(n){
	    var  e=n.document,
	         t=e.documentElement,
	         i=resolving,
	         d=i/100,
	         o="orientationchange"in n?"orientationchange":"resize",
	         a=function(){
	             var n=t.clientWidth||320;n>resolving&&(n=resolving);
	             t.style.fontSize=n/d+"px"
	         };
	         e.addEventListener&&(n.addEventListener(o,a,!1),e.addEventListener("DOMContentLoaded",a,!1))
	}(window);
}
setRem(750);